Belt-guide.



F. DUESTER'HOPF. BELT GUIDE.

APPLIOATION FILED 11111.28, 1909.

994,910, 9 y Patented June 13; 1911.

Fla. 4.

land at each end of the pulley I provide PATEiyT OFFICE.

FRANK DUSTERHQFF, 0F s ILVEB LAKE, HNNEBTA.

imm-Genis.

specmcation uf Letters raient.

Patented June 13, 1911.

Application led January 28, 1909. Serial No. 474,851.

To all whom 'it 'may concern.'

Be it known that I, FRANK DUEsTERHoFF, of Silver Lake, McLeod county, Minnesota, have invented certains-'new and useful Improvements in Belt-Guides, of which the following is a specification.

The object of my invention is to provide means, which will prevent a belt from running oli a pulley, the device being particularly useful in connection'with the belt between a threshing engine and a separator, where considerable difficulty is experienced in keeping the belt on the pulley, particularly when a strong wind is blowing. I do not confine myself however, to this application alone of the invention, as it is capableof use and will perform its functions satisfactorily wherever it is desired to use av belt and prevent it from running off1 either end of the pulley.

My invention `consists generally in means at each end of the pulley for causing the automatic tilting of the pulley to direct the belt toward the center thereof, in case it works too far off either end of the pulley. In the accompanying drawings forming part of this s ecification Figure 1 is a sectional view o a belt guide, embodying my invention, taken substantially on the line X-X of Fig. 2, Fig. 2 is an end view of the same, Fig. 3 is a plan view, Fig. 4 is a transverse sectional view.

In the drawing, 2represents a suit-able frame having curved, inclined guide ways 3 therein, adapted to receive bearings 4, which are mounted on the ends of a shaft 5. These bearings are adapted to slide back and forth in the guide ways to accommodate lthemselves to the inclination or angle of the shaft. A pulley 6 is secured on this shaft cones 7 having elongated hubs 8, which are journaled on the shaft 5. Beveled gear wheels 9 are keyed on the hubs 8 and have their teeth in engagement with inclined racks 10, which are carried by the walls of the base 2. These rack bars are inclined in planes parallel with the plane of inclination of the guide ways 3 and the engagement of .the `gear wheels 9 with the teeth of the bars 10 will cause the movement of the bearings 4 in said guide ways and raise or lower one end of the shaft 5. A yoke 11 is provided within the casing 2 and has a pivoted joint 12 connecting it with a bolt 13 that is mounted in said base, said yoke having the effect of holding-the shaft in place and rmitting one end to rise and the other en to dro throughthe engagement of the belt wit one of the cones 7 This engagement will take place when the belt works oi the end. of the ulley 6 and rides up on the periphery o the cone at that end. When the engagement of the belt with the cone takes place,- the cone and hub will be revolved and that end of the pulley with` the shaft and cone `will be raised or tilted above the level of the opposite end.- Consequently and a shoulder formed above the thread, with which the nut contacts, thus securing the bolt in the frame while permitting it tol oscillate freely in its bearing.

During the movement of one end of the pulley shaft in one direction, its opposite end will move in the other direction until the belt has returned to its normal position on the face of the pulley, when the shaft will gradually work toward the center of the guide ways and the pulley will assume a horizontal position. It will be immaterial which way the belt works, as the operation of the cones at each end of the pulley will be the same and the contact of the belt therewith will cause the revolution of the cone and the movement of the shaft in its guide- Way and the tilting of the pulley suliiciently to direct the belt back `to the center thereof.

In Fig. 3 I have illustrated sprin s 14 in the guide way on each side of the sha which by their tension, serve to keep the bearings of the shaft in the center of the guide way,

lyielding suificiently however, to allow the bearing to move back and forth in the guide way and accommodate itself to the tilting onf the pulley, caused by the tra'vel of the shaft gear on the rack bar.

I claim as my invention:

1. A belt guide, comprising a frame having curved inclined guide ways therein, and a shaft having bearings in said guide ,wa'ys, a pulley secured on said shaft, and means provided at the ends of said pulleyand engaged by the belt thereon for moving said shaft in said guide ways and tilting said pulley, substantially as described.

2. A belt guide, comprising a frame, a shaft having sliding bearings therein and arranged to move at an angle to the horizonta'l a pulley secured on said shaft, cones provi ed at each end of said pulley and 'hav- 1n means for oscillating said shaft in its gulde ways to raise or lower either end of said pulley, and a yoke havi bearings for said cones on each side of sai pulley and a pivotal connection with said frame, substantially as described.

"3. A belt guide, comprising a frame having inclined curved guide wa s therein, a shaft having bearings in sai `guideways, and springs in said guide ways upon each side of said shaft, a pulleysecure on said shaft, cones mounted on said shaft at each end of said pulley, and means actuated by the contact of the belt with said cones for oscillating said shaft in its guide Ways to tilt either end of said pulley, for the purpose specified.

4. A belt guide comprising a frame having curved guideways therein, a shaft having bearings in said ways, a pulley secured.

on said shaft, and means engaged by the ing inclined guideways, a shaft ha'ving bearings in said ways, a pulle secured on said shaft and means engage by the belt on said pulley for oscillating said shaft in said guide-ways and tilting said pulley.

6. A belt guide comprising a frame having inclined guide'ways, a shaft having bearings in said ways, a-pulley secured on said shaft, means engagedy by the belt o'n said pulley for oscillating dsaid shaft in said guide-ways and tilting said pulley, and yielding means for normally centering said pulley with respect to said guide-ways.

In witness whereof, I have hereunto set 4o my hand this 15th day of January 1909.

FRANK' DUESTERHOFF.

Witnesses:

RICHARD PAUL, J. A. BYINGTON. 

